The Antarctic sea ice alga Chlamydomonas sp. ICE-L provides insights into adaptive patterns of chloroplast evolution ...

Abstract Background The ice alga Chlamydomonas sp. ICE-L is the main contributor to primary productivity in Antarctic sea ice ecosystems and is well adapted to the extremely harsh environment. However, the adaptive mechanism of Chlamydomonas sp. ICE-L to sea-ice environment remains unclear. To study...

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Bibliographic Details
Main Authors: Zhang, Zhenhua, An, Meiling, Miao, Jinlai, Gu, Zhiqiang, Liu, Chang, Zhong, Bojian
Format: Article in Journal/Newspaper
Language:unknown
Published: figshare 2018
Subjects:
Genetics
FOS Biological sciences
Evolutionary Biology
Environmental Sciences not elsewhere classified
Ecology
Biological Sciences not elsewhere classified
Inorganic Chemistry
FOS Chemical sciences
Plant Biology
Computational Biology
Antarc*
Antarctic
Sea ice
Online Access:https://dx.doi.org/10.6084/m9.figshare.c.4058195.v1
https://springernature.figshare.com/collections/The_Antarctic_sea_ice_alga_Chlamydomonas_sp_ICE-L_provides_insights_into_adaptive_patterns_of_chloroplast_evolution/4058195/1
Description
Summary:Abstract Background The ice alga Chlamydomonas sp. ICE-L is the main contributor to primary productivity in Antarctic sea ice ecosystems and is well adapted to the extremely harsh environment. However, the adaptive mechanism of Chlamydomonas sp. ICE-L to sea-ice environment remains unclear. To study the adaptive strategies in Chlamydomonas sp. ICE-L, we investigated the molecular evolution of chloroplast photosynthetic genes that are essential for the accumulation of carbohydrate and energy living in Antarctic sea ice. Results The 60 chloroplast protein-coding genes of Chlamydomonas sp. ICE-L were obtained, and the branch-site test detected significant signatures of positive selection on atpB, psaB, and rbcL genes in Chlamydomonas sp. ICE-L associated with the photosynthetic machinery. These positively selected genes were further identified as being under convergent evolution between Chlamydomonas sp. ICE-L and the halotolerant alga Dunaliella salina. Conclusions Our study provides evidence that the ...

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